Concrete floor form



Pofenfed Dec. 6, 1949 UNTED STAfES Appfioation Maroh 7, 1947, sefi1 No. 233,029

2 cla imS.

The invenfion felafes fo ifnpfovefnents in bI1ilding oonstruction, partioulafly to b11ilding oonSffuction in Which pfe-casf and poufed oe ff1ent afe uSed together, but fnofe particulafly to the uSe of precaSf joiSfs with poured floorS; and haS fof' itS objects the developn1ent of a forn1 of oonSfroofion and fnethod of aSSeInbly Whioh wi11 be siInple of struotufe, eaSy to oonstfuct and highly ecient in use.

ThiS invention and thiS app1ication fufther re lafe to 9a joint app1ication Sefial Nun1ber 678,383, 1ed June 21, 196, foI' Boilding oon- Stfuofion, and sti11 pending.

()ther objects vvi11 ppeaf hefeinaftef.

The invention conSistS in the oon1binations and affangen1entS of partS hefeinafter deScribed and olafIned.

The invention vvi11 loe best underStood by feference to the acoompanying drawingS forming a paft of this Specification, and in Which 1 ,igI1fe 1 iS a vertioa1 section of Iny iInpfoved noor oonStruction, illustfating the afrangenlent of the Supporfing forIns and the releasable nleans by Which they afe supported, and a ofoSS Seofion of the pfe-oaSt joistS used; and

Figofe 2 is a oeiling plan vieW of Figufe 1.

The eII1bodifflenf of the invention illustrated in the dravvingS con1pfiSes pfeoaSt oists l arfanged in Suifably spaoed relation, With the endS thefeof reSting on a Suitable Wa11 S. aoh

joist l5 is pfovided Wifh an offSet upper poftion lf on each of itS faces lB fofn1ing fioof Supporting ledges 3, and is fufthef provided with 2 fein fofcing stee1 fods 23 set adjacent the lovvef edge thefeof. The joists f3 afe provided, of a Shoft distance above the said fods 23 vvith veftica1 S1ofs 2l therethfough, having openingS on eaoh faoe l3 and afe spaoed at suitable disfanoe aparf throughout the length thefeof, being adapted to serve aS nounting fneans fof' coopefating key fneInbers 22. The key members 22 are used in paifS inSefted in the slotS 2l ffoIn opposite Sides of the joisfs 3, as beSt shown in E'igure 1. aoh key n1eIT1beI' 22 is oonStfucted fron1 stee1 plate of even thiokneSS and is SubStantiany L-shaped With a wedge shaped stem portion 23 and a Shoft arfn poftion 24 affanged of fight angle to the lovver edge of the Sten1, as used. vvhen in 11Se in the s1otS 2l the stefn poffions afe oveflapped at eaoh end, the oveflapped poftion being pfo of hookS afe forIned by the shoft afIn portionS 24 pfotfuding ffofn a face l3, and are affanged Lnd adapted to hold a Stee1 1edge baf 26 vvhich extendS the ff111 1ength of the joiSt faoe 3 iff poSi tion to serve as ren1ovable Shouldefs for Sup pofting stee1 arch plates 3 and 32, as beSt Shown in Figure 1. The aroh plafe 3 iS provided vvith an angular lip portion 33 at its opper edge, Whioh is adapted to be inSerted in groove 34 forfned by a ohannel bar 35 fiveted to the upper portion of the afch plafe 32, as ShoW- Bach of the arch plateS 3! and 32 afe provided with lap bars 36 fof feinfofcing and providing a laJp surface f()f the nexf adjoining afoh plate, as Wi11 be feadily undefstood.

The affangeInent is Such that aftef the preoaSt joisfs l5 afe set in desifed position, a paff' of key nleInberS 22 is plaoed in each of the s1ots zl vvfth 1edge bars 26 festing theTeon. fhe arch plates 3| and 32 afe then asSeInbled in afohed position, the key n1eInbefS 22 dfiven into place and pin 25 inserted. The flooI' 3f can fhen be poured. Aftef the poured oefnent haS Set fo the deSired state of o11ring, the assenlbled forIn paftS oan be easily and quickly dfopped by fe leasing the key InefnbefS 22. The slotS 2l Which have served fof the key Inefnbers 22 oan then be closed by patohing With oefnent, of left for the placing of eleoffica1 wireS of the like, if so deSired.

vvhile have i11I1Strated and desoribed a pfe ciSe afrngen1ent for oarrying nly invention into effeot, thiS is oapable of vafiations and 1nodi oationS. I, therefore, do nof vvish to be lin1ifed to the oonstruotion Shown, but desire to avai1 IT1y Self of such ohanges as nlay fa11 Within the soope of the appended olaiIns.

1. A n1old for an arched fioof consffootion offanged between pfecaSt concrete joisfS, eaoh of said jofStS being pfovided vvith a plufality of longitudinally aligned veftioally extending s1otS thefe thfough; Which compfiseS 3 pair of key membef support elen1enfs arfanged in opposed and slidable poSition Within each slof, a verti oally afranged afn1 on eaoh key nlefnbef af ranged in parallel olaInping relation With aJ Wan of a joiSt; n1eans for Inutoally holding said vef tically affanged afIns in pafanel felation With each Side of a joist; al longitudina Suppoft n1ounfed against each side of a joist and held rby Said arInS arranged and adapted to support a paiI' of coInpanion arch plates, and a pair of ooIn panion aroh plates Inounted on Said Suppoft.

2. The conStfuotion, specified in clain1 1 in Whfoh the cofnpanion aroh plates afe afranged 3 in a substantiall v sha e vv1th the1r bottom Number edges resting on the longitudinal supports car 95,830 Tied on the vertica1 arnns. 1,293,838 JAs LDBTTB. 2,217 278 BEEEBENcES cITED 5 T11e fonowing references are record in the 3 f1le of this patent= UNTD STATBS PATENTs 10 Number Name Dte 710 506 dNen oct. 7. 1902 Name Date TJnderwood Apr. 12, 1910 11cKa Feb. 11, 1919 Kanter oct, 8, 1940 EOBBIGN PATENTS countr Date France Dec. 2, 193 

